Mechanism of deep cracks in the left bank slope of Jinping first stage hydropower station

2004 ◽  
Vol 73 (1-2) ◽  
pp. 129-144 ◽  
Author(s):  
Shengwen Qi ◽  
Faquan Wu ◽  
Fuzhang Yan ◽  
Hengxing Lan
Keyword(s):  
Hydropower Station ◽  
Left Bank ◽  
Bank Slope

Sensor Network Optimal Design of Microseismic Monitoring System at the Left Slope of Jinping I Hydropower Station

2013 ◽  
Vol 353-356 ◽  
pp. 872-876 ◽  
Author(s):  
Gang He ◽  
Nu Wen Xu ◽  
Chun Sha ◽  
Li Tian
Keyword(s):  
Optimal Design ◽  
Monitoring System ◽  
Sensor Array ◽  
Sensor Arrays ◽  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Left Bank ◽  
Rock Fracturing ◽  
Bank Slope ◽  
Jinping I Hydropower Station

In order to real time monitor and analyze the rock fracturing due to continuous construction and consolidation at the left slope of Jinping I hydropower station, southwest of China, a microseismic monitoring system was conducted and an optimal design for the sensor arrays was investigated. The sensor array was designed on the basis of P method and Powell algorithm. The artificial fixed blasting tests were applied to adjust the positioning accuracy of the monitoring system. The results show that the location error of seismic source is less than 12 m in the scope of the sensor array, which demonstrates the monitoring system has high positioning g accuracy. The contour of source location shows that the location errors near the main tunnels at the left bank slope is below 6 m. Signals from 689 microseismic events with moment magnitude ranging from -2.1 to -0.2 were recorded during the first year monitoring period from June 15, 2009. The spatial distribution of microseismicity can identify and delineate the potential failure at the left bank slope, which provides some references for the future excavation and consolidation of the hydropower station.

Microseismic Monitoring of the Left Bank Slope at the Baihetan Hydropower Station, China

2016 ◽  
Vol 50 (1) ◽  
pp. 225-232 ◽  
Author(s):  
Feng Dai ◽  
Biao Li ◽  
Nuwen Xu ◽  
Guotao Meng ◽  
Jiayao Wu ◽  
...  
Keyword(s):  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Left Bank ◽  
Bank Slope ◽  
Baihetan Hydropower Station

Estimation of Excavation Disturbed Zone of High Slope in the Left Bank of Jinping-I Hydropower Station

2012 ◽  
Vol 212-213 ◽  
pp. 998-1003
Author(s):  
Jun Peng ◽  
Guan Rong ◽  
Zhi Lin Li
Keyword(s):  
Displacement Field ◽  
Arch Dam ◽  
Hydropower Station ◽  
Maximum Height ◽  
Left Bank ◽  
Bank Slope ◽  
Disturbed Zone ◽  
Geological Conditions ◽  
Excavation Disturbed Zone ◽  
Jinping I Hydropower Station

The proposed Jinping-I hydropower station is located on the middle reach of the Yalongjiang River, Sichuan Province, P.R. China. It consists of a double-curvature arch dam with a maximum height of 305 m, which will be the highest in the world. Excavation disturbed zone (EDZ) in the left bank slope is one of the most important aspects in slope stability and deformation evaluation. This paper is focused on estimation of EDZ in the left bank slope of Jinping-I hydropower station based on numerical simulation. Geological conditions of the left bank slope are firstly analyzed. Then, displacement field of the slope during excavation is calculated by finite element method (FEM). It can be indicated that the model and parameters in this paper is reasonable by comparing observed results with calculated ones. EDZ in the left bank slope can be estimated based on the calculated displacement field. It can be inferred that the range of EDZ is related to the controlling discontinuities such as fault f42-9 and Lamprophyre X etc. which are adjacent to the excavation line.

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